JP5724071B2 - Method for preventing slime generation in papermaking process - Google Patents
Method for preventing slime generation in papermaking process Download PDFInfo
- Publication number
- JP5724071B2 JP5724071B2 JP2014504516A JP2014504516A JP5724071B2 JP 5724071 B2 JP5724071 B2 JP 5724071B2 JP 2014504516 A JP2014504516 A JP 2014504516A JP 2014504516 A JP2014504516 A JP 2014504516A JP 5724071 B2 JP5724071 B2 JP 5724071B2
- Authority
- JP
- Japan
- Prior art keywords
- papermaking process
- slime
- bactericidal
- rate
- process water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 239000003899 bactericide agent Substances 0.000 claims description 49
- 230000000844 anti-bacterial effect Effects 0.000 claims description 36
- 238000004659 sterilization and disinfection Methods 0.000 claims description 33
- 230000001954 sterilising effect Effects 0.000 claims description 29
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 22
- 230000002265 prevention Effects 0.000 claims description 20
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 claims description 19
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 16
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 claims description 9
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 9
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 8
- 244000005700 microbiome Species 0.000 claims description 5
- 241001135759 Sphingomonas sp. Species 0.000 claims description 2
- 239000003206 sterilizing agent Substances 0.000 claims description 2
- 239000001166 ammonium sulphate Substances 0.000 claims 1
- 239000003814 drug Substances 0.000 description 27
- 229940079593 drug Drugs 0.000 description 27
- 238000004519 manufacturing process Methods 0.000 description 16
- 241000894006 Bacteria Species 0.000 description 15
- 239000000645 desinfectant Substances 0.000 description 14
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 12
- 239000000460 chlorine Substances 0.000 description 12
- 229910052801 chlorine Inorganic materials 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 8
- 230000001629 suppression Effects 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 239000012085 test solution Substances 0.000 description 6
- 230000001580 bacterial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 230000032770 biofilm formation Effects 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000855 fungicidal effect Effects 0.000 description 2
- 239000000417 fungicide Substances 0.000 description 2
- 230000002070 germicidal effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 2
- CRWJEUDFKNYSBX-UHFFFAOYSA-N sodium;hypobromite Chemical compound [Na+].Br[O-] CRWJEUDFKNYSBX-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 206010053759 Growth retardation Diseases 0.000 description 1
- 102000006835 Lamins Human genes 0.000 description 1
- 108010047294 Lamins Proteins 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 210000005053 lamin Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
- D21H21/04—Slime-control agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
この発明は、製紙工程におけるスライム発生防止方法に関し、さらに詳しくは、殺菌率を９０％以上とすることなく、製紙工程中のスライムの付着を抑制することが可能な製紙工程におけるスライム発生防止方法に関する。 The present invention relates to a slime generation prevention method in a papermaking process, and more particularly, to a slime generation prevention method in a papermaking process capable of suppressing the adhesion of slime during the papermaking process without setting the sterilization rate to 90% or more. .
紙パルプ製造工程では、原料となる木材に由来するセルロースや糖類等を栄養源として、製紙工程水やパルプスラリーに細菌や微生物が繁殖してスライムが発生する。そして、このスライムが、製紙原料に混入して紙切れによる生産効率の低下を引き起こしたり、紙製品の品質を低下させたりすることは、従来からよく知られている。 In the pulp and paper manufacturing process, bacteria and microorganisms are propagated in the papermaking process water and pulp slurry using cellulose, saccharides and the like derived from wood as a raw material to generate slime. And it has been well known that this slime is mixed into the papermaking raw material to cause a reduction in production efficiency due to running out of paper or to reduce the quality of paper products.
このため、スライムの発生を抑制するために、従来から殺菌剤を用いた様々な方法や、様々なスライム処理剤等が提案されている。例えば、製紙工程の上流の原料系に当たる損紙系を、他の原料と混合される直前まで常に菌数を１×１０7個／ｍＬ以下に維持するように、抗菌剤を用いて制御することなどが提案されている（例えば、特許文献１参照）。また、通常、微生物を十分に抑制するには殺菌率を９０％以上に維持する必要があり、殺菌率が９０％以上でないと十分な殺菌力を示さないと一般的には考えられている。For this reason, in order to suppress generation | occurrence | production of slime, the various methods using a disinfectant, various slime processing agents, etc. are proposed conventionally. For example, controlling the waste paper system corresponding to the raw material system upstream of the paper making process using an antibacterial agent so that the number of bacteria is always maintained at 1 × 10 7 cells / mL or less until immediately before mixing with other raw materials. Etc. have been proposed (see, for example, Patent Document 1). Further, it is generally considered that the sterilization rate needs to be maintained at 90% or more in order to sufficiently suppress microorganisms, and if the sterilization rate is not 90% or more, sufficient sterilization power is not exhibited.
本発明は、被処理対象に対する殺菌剤の殺菌率を９０％以上にすることなく、製紙工程中の各工程におけるスライムの付着を抑制し、紙製品にスライム付着物が混入することを効果的に防止することが可能な製紙工程におけるスライム発生防止方法を提供する。 The present invention suppresses the adhesion of slime in each step during the papermaking process without effectively increasing the sterilization rate of the bactericide to the object to be treated, and effectively mixes the slime deposits with the paper product. Provided is a method for preventing slime generation in a papermaking process that can be prevented.
本発明は、製紙工程におけるスライム発生防止方法であって、被処理対象となる製紙工程水に対する殺菌剤の殺菌率が５０％以上９０％未満となるように殺菌剤を前記製紙工程水に添加することを含み、前記殺菌剤がモノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤である、スライム発生防止方法に関する。 The present invention is a method for preventing slime generation in a papermaking process, wherein a bactericidal agent is added to the papermaking process water so that the sterilization rate of the bactericide with respect to the papermaking process water to be treated is 50% or more and less than 90%. In addition, the present invention relates to a slime generation prevention method, wherein the bactericidal agent is a bactericidal agent that produces and / or contains monochloramine and / or monobrolamin.
この発明によれば、スライムが発生しやすい環境下にある紙製造工程において、製紙工程中の各工程におけるスライムの付着を抑制し、紙製品にスライム付着物が混入することを効果的に防止する方法を提供できる。 According to this invention, in the paper manufacturing process in an environment where slime is likely to occur, the slime adhesion in each step during the paper making process is suppressed, and the slime deposits are effectively prevented from being mixed into the paper product. Can provide a method.
本発明は、製紙工程におけるスライム発生防止方法であって、被処理対象となる製紙工程水に対する殺菌剤の殺菌率が５０％以上９０％未満となるように殺菌剤を前記製紙工程水に添加することを含み、前記殺菌剤が、モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤であるスライム発生防止方法によって、製紙工程中の各工程におけるスライム付着を抑制し、紙製品へスライム付着物が混入することを効果的に防止することができるという知見に基づく。 The present invention is a method for preventing slime generation in a papermaking process, wherein a bactericidal agent is added to the papermaking process water so that the sterilization rate of the bactericide with respect to the papermaking process water to be treated is 50% or more and less than 90%. The antibacterial agent is a bactericide that produces and / or contains monochloramine and / or monobrolamin, and prevents slime from adhering in each step during the paper making process. Based on the knowledge that it is possible to effectively prevent the adhering matter from being mixed.
また、本発明は、製紙工程におけるスライム発生を防止する場合において、通常、殺菌率を９０％以上、好ましくは９９％程度以上という高いレベルに維持して処理する必要があると考えられていた。しかしながら、モノクロラミン及び／若しくはモノブロラミンを生成する殺菌剤、又はモノクロラミン及び／若しくはモノブロラミンを含む殺菌剤を用いることによって、製紙工程水に対する殺菌剤の殺菌率が５０％以上９０％未満であっても、製紙工程中の各工程におけるスライム付着を十分に抑制し、紙製品へのスライム付着物の混入が効果的に防止することができるという知見に基づく。 Further, in the present invention, when slime generation is prevented in the papermaking process, it has been considered that it is usually necessary to maintain the sterilization rate at a high level of 90% or higher, preferably about 99% or higher. However, the disinfection rate of the disinfectant with respect to the papermaking process water is 50% or more and less than 90% by using a disinfectant that generates monochloramine and / or monobrolamin or a disinfectant containing monochloramine and / or monobrolamin. However, it is based on the knowledge that slime adhesion in each process in the papermaking process can be sufficiently suppressed and mixing of the slime deposits into the paper product can be effectively prevented.
本発明の方法により、製紙工程中の各工程におけるスライム付着を十分に抑制でき、紙製品にスライム付着物が混入することを効果的に防止することができる理由は明らかではないが、以下のように推定している。モノクロラミン及びモノブロラミンは、製紙工程水に添加後、安定した状態で処理対象である製紙工程水に残留する。このため、５０％以上９０％未満という低い殺菌率であっても、製紙工程におけるスライムの発生及び／又はスライムの付着を十分に抑制できるものと推測される。但し、本発明はこれらのメカニズムに限定されるものではない。 The reason why the method of the present invention can sufficiently suppress slime adhesion in each step during the papermaking process and can effectively prevent the slime deposits from being mixed into the paper product is not clear, but is as follows. Is estimated. Monochloramine and monobrolamin remain in the papermaking process water to be treated in a stable state after being added to the papermaking process water. For this reason, even if it is the low sterilization rate of 50% or more and less than 90%, it is estimated that generation | occurrence | production of the slime in a papermaking process and / or adhesion of slime can fully be suppressed. However, the present invention is not limited to these mechanisms.
本発明の方法によれば、製紙工程水に添加する殺菌剤の殺菌率が通常よりも低いことから、例えば、製紙工程水に添加する殺菌剤の濃度を通常よりも低くすることができる。このため、本発明の方法によれば、例えば、処理に要するコスト等を低減でき、また、製紙工程に用いられる配管等の腐食を低減できるという効果を好ましくは奏しうる。また、さらには、処理時の安全性が向上するという効果を好ましくは奏しうる。 According to the method of the present invention, since the sterilization rate of the bactericide added to the papermaking process water is lower than usual, for example, the concentration of the bactericide added to the papermaking process water can be made lower than usual. For this reason, according to the method of the present invention, for example, the cost required for the treatment can be reduced, and the effect that the corrosion of the piping used in the papermaking process can be reduced can be preferably achieved. Furthermore, the effect that the safety | security at the time of a process improves can be show | played preferably.
本明細書において「製紙工程水」とは、製紙白水（抄紙白水）、パルプ白水を含む。限定されない一又は複数の実施形態において、製紙工程水は、循環利用又は再利用されるものを含み、製紙工程中の各工程を循環する製紙工程水循環系における製紙工程水である。本明細書において「製紙工程水循環系」とは、製紙工程水の循環利用又は再利用を含む系をいう。 In this specification, “papermaking process water” includes papermaking white water (papermaking whitewater) and pulp whitewater. In one or more non-limiting embodiments, the papermaking process water is papermaking process water in a papermaking process water circulation system that circulates each process in the papermaking process, including those that are recycled or reused. In this specification, the “papermaking process water circulation system” refers to a system including circulation or reuse of papermaking process water.
本明細書において「モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤（以下、「本発明で使用する殺菌剤」ともいう）」は、モノクロラミンを生成する殺菌剤、モノクロラミンを含む殺菌剤、モノブロラミンを生成する殺菌剤、モノブロラミンを含む殺菌剤、モノクロラミン及びモノブロラミンを生成する殺菌剤、モノクロラミン及びモノブロラミンを含む殺菌剤を含む。本発明で使用する殺菌剤は、限定されない一又は複数の実施形態において、水溶液の形態のものを使用でき、市販の次亜塩素酸ナトリウム水溶液と、硫酸アンモニウム水溶液及び／又は臭化アンモニウム水溶液とを使用できる。 In this specification, “a bactericidal agent that produces and / or contains monochloramine and / or monobrolamin” (hereinafter, also referred to as “bactericidal agent used in the present invention”) refers to a bactericidal agent that produces monochloramine, monochloramine. A bactericidal agent containing monobrylamine, a bactericidal agent containing monobroramine, a bactericidal agent containing monobralamine and a monobroramine, a bactericidal agent containing monobralamine and a monobrolamine. In one or a plurality of non-limiting embodiments, the disinfectant used in the present invention can be in the form of an aqueous solution, and uses a commercially available sodium hypochlorite aqueous solution, ammonium sulfate aqueous solution and / or ammonium bromide aqueous solution. it can.
本明細書において「次亜塩素酸ナトリウム水溶液」は、特に限定されず、その濃度も特に限定されなくてよい。安定性及びスペースの観点からは濃度は高いことが好ましい。添加前の殺菌剤において次亜塩素酸ナトリウム水溶液の濃度が高いとは、特に限定されない一又は複数の実施形態において、例えば、有効塩素濃度が６０ｇ／Ｌ以上であることをいい、好ましくは１１０〜１４５ｇ／Ｌ以上をいう。 In the present specification, the “sodium hypochlorite aqueous solution” is not particularly limited, and the concentration thereof is not particularly limited. From the viewpoint of stability and space, the concentration is preferably high. The high concentration of the sodium hypochlorite aqueous solution in the disinfectant before the addition means that, in one or a plurality of embodiments not particularly limited, for example, the effective chlorine concentration is 60 g / L or more, preferably 110 to 145 g / L or more.
本明細書において「スライム発生防止」とは、特に限定されないが、スライムの原因となる微生物の殺菌及び増殖抑制を含む。 In the present specification, “prevention of slime generation” is not particularly limited, but includes sterilization and growth suppression of microorganisms that cause slime.
本明細書において「殺菌率」とは、製紙工程水における生菌数（薬剤添加前の生菌数）と、殺菌剤による処理後の製紙工程水における生菌数（薬剤添加後の生菌数）とを用いて下記式から算出された殺菌率をいう。
殺菌率（％）＝｛（薬剤添加前の菌数−薬剤添加後の菌数）／薬剤添加前の菌数｝×１００In this specification, the “bactericidal rate” means the number of viable bacteria in the papermaking process water (viable bacteria number before adding the drug) and the viable cell count in the papermaking process water after treatment with the bactericidal agent (viable cell count after adding the drug) ) And the sterilization rate calculated from the following formula.
Bactericidal rate (%) = {(the number of bacteria before adding the drug-the number of bacteria after adding the drug) / the number of bacteria before adding the drug} × 100
［スライム発生防止方法］
本発明は、一又は複数の実施形態において、被処理対象となる製紙工程水に対する殺菌剤の殺菌率が５０％以上９０％未満となるように殺菌剤を前記製紙工程水に添加することを含み、殺菌剤がモノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤である、製紙工程におけるスライム発生防止方法（以下、「本発明のスライム発生防止方法」ともいう）に関する。[Slime prevention method]
In one or a plurality of embodiments, the present invention includes adding a bactericidal agent to the papermaking process water so that the bactericidal rate of the bactericide with respect to the papermaking process water to be treated is 50% or more and less than 90%. The present invention relates to a slime generation prevention method in a papermaking process (hereinafter, also referred to as “the slime generation prevention method of the present invention”), wherein the bactericide is a bactericide that produces and / or contains monochloramine and / or monobrolamin.
本発明のスライム発生防止方法において、モノクロラミンを生成又は含む殺菌剤の場合、殺菌剤の殺菌率は、殺菌剤の使用量を低減し、配管等の腐食を抑制する観点から、５０％以上８９％以下が好ましく、より好ましくは５５％以上８５％以下、さらに好ましくは６０％以上８０％以下である。また、モノブロラミンを生成する及び／又は含む殺菌剤の場合、５０％以上８９％以下が好ましく、より好ましくは５５％以上８５％以下、さらに好ましくは６０％以上８０％以下である。 In the slime generation prevention method of the present invention, in the case of a bactericidal agent that produces or contains monochloramine, the bactericidal rate of the bactericidal agent is 50% or more from the viewpoint of reducing the amount of the bactericide used and suppressing corrosion of piping and the like. % Or less, more preferably 55% or more and 85% or less, and still more preferably 60% or more and 80% or less. In the case of a bactericidal agent that produces and / or contains monobrolamin, it is preferably 50% or more and 89% or less, more preferably 55% or more and 85% or less, and further preferably 60% or more and 80% or less.
本発明のスライム発生防止方法は、モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤を使用すればよく、一又は複数の実施形態において、次亜塩素酸ナトリウム水溶液と硫酸アンモニウム水溶液及び／又は臭化アンモニウム水溶液とを含む殺菌剤を使用することが好ましい。また、本発明のスライム発生防止方法は、一又は複数の実施形態において、次亜塩素酸ナトリウム水溶液と硫酸アンモニウム水溶液及び／又は臭化アンモニウム水溶液とを製紙工程水に別々に添加することを含みうる。 The slime generation prevention method of the present invention may use a bactericide that produces and / or contains monochloramine and / or monobrolamin. In one or more embodiments, an aqueous sodium hypochlorite solution and an aqueous ammonium sulfate solution and / or Or it is preferable to use the disinfectant containing ammonium bromide aqueous solution. Moreover, the slime generation | occurrence | production prevention method of this invention can include adding sodium hypochlorite aqueous solution, ammonium sulfate aqueous solution, and / or ammonium bromide aqueous solution separately to papermaking process water in one or some embodiment.
本発明に用いられる次亜塩素酸ナトリウムと硫酸アンモニウム及び／又は臭化アンモニウムとのモル比は、一又は複数の実施形態において、有効塩素量と窒素のモル比（有効塩素量：窒素）として１：１〜１：２、好ましくは１：１．２〜１：１．５である。 In one or more embodiments, the molar ratio of sodium hypochlorite to ammonium sulfate and / or ammonium bromide used in the present invention is 1 as the molar ratio of effective chlorine to nitrogen (effective chlorine content: nitrogen). It is 1-1: 2, preferably 1: 1.2-1: 1.5.
製紙工程水に添加されるモノクロラミン及び／又はモノブロラミンの濃度（製紙工程水に添加後の濃度）は、全残留塩素濃度として被処理対象である製紙工程水に対する殺菌剤の殺菌率に応じて適宜決定できるが、一又は複数の実施形態において、例えば、０．１〜２０ｍｇ／Ｌ、好ましくは０．１〜１０ｍｇ／Ｌである。 The concentration of monochloramine and / or monobrolamin added to the papermaking process water (concentration after addition to the papermaking process water) depends on the sterilization rate of the disinfectant for the papermaking process water to be treated as the total residual chlorine concentration Although it can determine suitably, in one or some embodiment, it is 0.1-20 mg / L, for example, Preferably it is 0.1-10 mg / L.
本発明のスライム発生防止方法は、一又は複数の実施形態において、殺菌剤の殺菌率を算出することを含んでいてもよく、また、殺菌率の算出を定期的に行い、得られた殺菌率に基いて製紙工程水に添加する殺菌剤の量を調整することを含みうる。殺菌率の算出は、例えば、製紙工程水における生菌数（薬剤添加前の生菌数）、及び殺菌剤による処理後の製紙工程水における生菌数（薬剤添加後の生菌数）を得て、得られた生菌率を用いて上記式より殺菌率を算出することを含みうる。 In one or a plurality of embodiments, the slime generation prevention method of the present invention may include calculating the sterilization rate of the sterilizing agent, and periodically calculating the sterilization rate and obtaining the sterilization rate obtained. And adjusting the amount of bactericidal agent added to the papermaking process water. The sterilization rate is calculated, for example, by obtaining the viable cell count in the papermaking process water (viable cell count before adding the drug) and the viable cell count in the papermaking process water after treatment with the bactericide (viable cell count after adding the drug). And calculating the bactericidal rate from the above formula using the obtained viable cell rate.
本発明のスライム発生防止方法は、本発明の効果を阻害しない範囲において、公知の殺菌剤を併用添加することもできる。 In the slime generation prevention method of the present invention, a known bactericidal agent can be added in combination as long as the effects of the present invention are not impaired.
本発明のスライム発生防止方法によれば、製紙工程におけるスライムの発生を防止することができることから、製紙工程水系におけるバイオフィルムの生成を抑制及び／又は生成したバイオフィルムを除去することができる。本明細書において「バイオフィルム」とは、スライムで囲まれた微生物が集合したフィルム状の構造物のことをいう。 According to the slime generation preventing method of the present invention, since the generation of slime in the papermaking process can be prevented, the production of biofilm in the papermaking process water system can be suppressed and / or the generated biofilm can be removed. In this specification, “biofilm” refers to a film-like structure in which microorganisms surrounded by slime are gathered.
［バイオフィルムの生成抑制／除去方法］
よって、本発明は、一又は複数の実施形態において、殺菌率が５０％以上９０％未満となるように殺菌剤を製紙工程水に添加することを含み、前記殺菌剤が、モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤である、製紙工程水系においてバイオフィルムの生成を抑制する方法に関する。本発明のバイオフィルムの生成抑制方法は、一又は複数の実施形態において、被処理対象となる製紙工程水に対する殺菌剤の殺菌率を算出すること、及び算出した前記殺菌率に基き、前記殺菌剤の添加量を調整することを含んでいてもよい。また、本発明のバイオフィルムの生成抑制方法は、本発明のスライム発生防止方法を行うことを含む、製紙工程水系におけるバイオフィルムの生成を抑制する方法である。[Biofilm formation suppression / removal method]
Therefore, in one or a plurality of embodiments, the present invention includes adding a bactericidal agent to papermaking process water so that the bactericidal rate is 50% or more and less than 90%, and the bactericidal agent is monochloramine and / or The present invention relates to a method for suppressing biofilm formation in a papermaking process water system, which is a disinfectant that generates and / or contains monobrolamin. In one or a plurality of embodiments, the biofilm production suppression method according to the present invention calculates a bactericidal rate of a bactericide with respect to papermaking process water to be treated, and based on the calculated bactericidal rate, the bactericidal agent It may include adjusting the addition amount. Moreover, the production | generation suppression method of the biofilm of this invention is a method of suppressing the production | generation of the biofilm in a papermaking process water system including performing the slime generation prevention method of this invention.
また、本発明は、一又は複数の実施形態において、殺菌率が５０％以上９０％未満となるように殺菌剤を製紙工程水に添加することを含み、前記殺菌剤が、モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤である、製紙工程水系においてバイオフィルムを除去する方法に関する。また、本発明のバイオフィルム除去方法は、一又は複数の実施形態において、被処理対象となる製紙工程水に対する殺菌剤の殺菌率を算出すること、及び算出した前記殺菌率に基き、前記殺菌剤の添加量を調整することを含んでいてもよい。また、本発明のバイオフィルム除去方法は、本発明のスライム発生防止方法を行うことを含む、製紙工程水系におけるバイオフィルムを除去する方法である。 In one or a plurality of embodiments, the present invention includes adding a bactericidal agent to papermaking process water so that a bactericidal rate is 50% or more and less than 90%, and the bactericidal agent is monochloramine and / or The present invention relates to a method for removing biofilms in a papermaking process water system, which is a disinfectant that produces and / or contains monobroramine. In one or a plurality of embodiments, the biofilm removal method of the present invention calculates the bactericidal rate of the bactericidal agent for the papermaking process water to be treated, and based on the calculated bactericidal rate, the bactericidal agent It may include adjusting the addition amount. Moreover, the biofilm removal method of the present invention is a method of removing a biofilm in a papermaking process water system, including performing the slime generation prevention method of the present invention.
本発明のバイオフィルム生成抑制方法及びバイオフィルム除去方法において使用する殺菌剤及びその濃度、殺菌剤における次亜塩素酸ナトリウムと硫酸アンモニウム及び／又は臭化アンモニウムとのモル比、殺菌率の好ましい範囲等は本発明のスライム発生防止方法と同様である。 The bactericides used in the biofilm production suppression method and the biofilm removal method of the present invention and their concentrations, the molar ratio of sodium hypochlorite to ammonium sulfate and / or ammonium bromide in the bactericides, the preferred range of bactericidal rate, etc. This is the same as the slime generation prevention method of the present invention.
［紙の製造方法］
本発明は、一又は複数の実施形態において、被処理対象となる製紙工程水に対する殺菌剤の殺菌率を算出すること、及び製紙工程水に殺菌率が５０％以上９０％未満となるように殺菌剤を添加することを含み、前記殺菌剤が、モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤である。紙の製造方法（以下、「本発明の製紙方法」ともいう）に関する。また、本発明の製紙方法は、一又は複数の実施形態において、本発明のスライム発生防止方法を行うことを含む、紙の製造方法である。[Paper manufacturing method]
In one or a plurality of embodiments, the present invention calculates the sterilization rate of the bactericide with respect to the papermaking process water to be treated, and sterilizes the papermaking process water so that the sterilization rate is 50% or more and less than 90%. The germicide is a germicide that produces and / or contains monochloramine and / or monobrolamin. The present invention relates to a paper manufacturing method (hereinafter also referred to as “paper manufacturing method of the present invention”). Moreover, the paper manufacturing method of this invention is a paper manufacturing method including performing the slime generation prevention method of this invention in one or some embodiment.
本発明の製紙方法において使用する殺菌剤及びその濃度、殺菌剤における次亜塩素酸ナトリウムと硫酸アンモニウム及び／又は臭化アンモニウムとのモル比、殺菌率の好ましい範囲等は本発明のスライム発生防止方法と同様である。 The disinfectant used in the papermaking method of the present invention and its concentration, the molar ratio of sodium hypochlorite to ammonium sulfate and / or ammonium bromide in the disinfectant, the preferred range of the disinfection rate, etc. It is the same.
［製紙工程水の処理システム］
本発明は、一又は複数の実施形態において、被処理対象となる製紙工程水に対する殺菌剤の殺菌率を算出する手段と、殺菌率が５０％以上９０％未満となるように製紙工程水に殺菌剤を添加する薬剤添加手段とを備える、製紙工程水の処理システム（以下、「本発明の処理システム」ともいう）に関する。[Paper processing water treatment system]
In one or a plurality of embodiments, the present invention is a means for calculating a sterilization rate of a bactericide with respect to papermaking process water to be treated, and sterilizing papermaking process water so that the sterilization rate is 50% or more and less than 90%. The present invention relates to a papermaking process water treatment system (hereinafter also referred to as “treatment system of the present invention”) comprising a chemical addition means for adding a chemical agent.
本発明の処理システムは、一又は複数の実施形態において、製紙工程水における生菌数を測定する手段を備えていてもよい。 In one or a plurality of embodiments, the treatment system of the present invention may include means for measuring the number of viable bacteria in the papermaking process water.
本発明を試験例により具体的に説明するが、本発明はこれらの試験例により限定されるものではない。 The present invention will be specifically described with reference to test examples, but the present invention is not limited to these test examples.
（調製例１）菌液及び試験液の調製
製紙工場の製紙工程内の付着物からSphingomonas sp.を単離し菌株として用いた。この菌株を培養し、生育したコロニーを滅菌生理食塩水に加え、液の透過率が６６０ｎｍで５０〜６０％になるよう調整したものを菌液とした。また１／５００倍濃度の液体ツァペック培地に、菌液を１％加えたものを試験液とした。(Preparation Example 1) Preparation of Bacterial Solution and Test Solution Sphingomonas sp. Was isolated from the deposits in the papermaking process of a paper mill and used as a strain. This bacterial strain was cultured, and the grown colonies were added to sterilized physiological saline, and the bacterial liquid was adjusted so that the liquid permeability was 50 to 60% at 660 nm. A test solution was prepared by adding 1% of a bacterial solution to 1 / 500-fold concentrated liquid zapek medium.
（調製例２）薬剤Ａ（NaClO+(NH4)2SO4）及び薬剤Ｂ（NaClO+NH4Br）の調製
有効塩素として１２％の次亜塩素酸ナトリウム水溶液を純水で３０倍に希釈し、有効塩素：窒素とのモル比として１：１．２になるように硫酸アンモニウムを加え、モノクロラミンを生成又は含む殺菌剤である薬剤Ａを調製した。
同様に、有効塩素として１２％の次亜塩素酸ナトリウム水溶液を純水で３０倍に希釈し、有効塩素：窒素とのモル比として１：１．２になるように臭化アンモニウムを加え、モノブロラミンを生成又は含む殺菌剤である薬剤Ｂを調製した。Preparation Example 2 Preparation of Drug A (NaClO + (NH 4 ) 2 SO 4 ) and Drug B (NaClO + NH 4 Br) 12% sodium hypochlorite aqueous solution as effective chlorine was diluted 30 times with pure water. Then, ammonium sulfate was added so that the molar ratio of effective chlorine: nitrogen was 1: 1.2 to prepare Drug A, which is a fungicide that produces or contains monochloramine.
Similarly, 12% sodium hypochlorite aqueous solution as effective chlorine is diluted 30 times with pure water, and ammonium bromide is added so that the molar ratio of effective chlorine: nitrogen is 1: 1.2. Drug B, a fungicide that produces or contains lamin, was prepared.
（調製例３）薬剤Ｃ（NaClO）及び薬剤Ｄ（NaBrO）の調製
有効塩素として１２％の次亜塩素酸ナトリウム水溶液を純水で３０倍に希釈して薬剤Ｃを調製した。
有効塩素として１２％の次亜塩素酸ナトリウム水溶液を純水で３０倍に希釈し、次いで臭化ナトリウムを加え、有効塩素：臭素とのモル比として１：１．２になるように薬剤Ｄを調製した。Preparation Example 3 Preparation of Drug C (NaClO) and Drug D (NaBrO) Drug C was prepared by diluting a 12% sodium hypochlorite aqueous solution 30 times with pure water as effective chlorine.
Dilute a 12% sodium hypochlorite aqueous solution with pure water 30 times as effective chlorine, then add sodium bromide, and add drug D so that the molar ratio of effective chlorine: bromine is 1: 1.2. Prepared.
（試験例１）スライム付着抑制効果の確認
５００ミリリットルビーカーに６０メッシュの金網を吊るし、試験液を４００ミリリットル入れた。薬剤Ａ〜Ｄは、試験液に有効塩素濃度として０．１〜１．４４ｍｇ／リットルとなるように添加し、３０分接触させた後、新しい試験液に入れ替えた。この時、薬剤添加直前の菌数と薬剤添加３０分後の菌数をそれぞれ測定した。なお、試験開始日は１日１回、１日後と２日後は各２回、３日後は１回の計６回となるよう入れ替えを行なった。
以上の操作を実施した後、７２時間後にビーカー中の液を捨て、ビーカーと金網を乾燥させてから、再度ビーカーに金網を吊るし、１．５％歯垢水溶液（BUTLER社製、「Ｇ・Ｕ・Ｍ ＲＥＤ−ＣＯＴＥ」）を入れて１分間浸漬させた。水洗・乾燥後、７０％エタノールの１％アンモニア水溶液で歯垢液の赤い染料を溶解して正確に１０ミリリットルにメスアップした。この溶液の吸光度（５５０ｎｍ）を測定し、薬剤の効力を評価した。薬剤無添加時の吸光度（２．３５９Ａｂｓ）に対して７０％以上減少しているものをスライム抑制効果があると判断した。スライム抑制効果の判断については、薬剤添加時の吸光度から７０％減少した値である０．７０８Ａｂｓ以下をスライム抑制効果有りとした。
薬剤無添加の場合は、新しい試験液に入れ替える３０分前の菌数と入れ替える直前の菌数をそれぞれ測定した。殺菌率は以下の方法で算出し、一連の試験における殺菌率を表１に示す。(Test Example 1) Confirmation of slime adhesion inhibitory effect A 60-mesh wire mesh was suspended in a 500-ml beaker, and 400 ml of the test solution was added. The drugs A to D were added to the test solution so that the effective chlorine concentration was 0.1 to 1.44 mg / liter, and contacted for 30 minutes, and then replaced with a new test solution. At this time, the number of bacteria immediately before the addition of the drug and the number of bacteria 30 minutes after the addition of the drug were measured. Note that the test start date was changed to be 6 times, once a day, 2 times each after 1 day, 2 days later, and 1 time after 3 days.
After the above operation, the liquid in the beaker was discarded after 72 hours, the beaker and the wire mesh were dried, and the wire mesh was suspended in the beaker again, and a 1.5% plaque aqueous solution (manufactured by BUTLER, “G · U "M RED-COTE") was added and immersed for 1 minute. After washing with water and drying, the red dye of plaque solution was dissolved with 1% aqueous ammonia solution of 70% ethanol to make up to 10 ml accurately. The absorbance (550 nm) of this solution was measured to evaluate the efficacy of the drug. Those that decreased by 70% or more with respect to the absorbance (2.359 Abs) when no drug was added were judged to have a slime-inhibiting effect. Regarding the judgment of the slime suppression effect, 0.708 Abs or less, which is a value reduced by 70% from the absorbance at the time of drug addition, was regarded as having a slime suppression effect.
In the case of no drug addition, the number of bacteria just before the replacement was measured with the number of bacteria 30 minutes before the replacement with a new test solution. The sterilization rate is calculated by the following method, and the sterilization rate in a series of tests is shown in Table 1.
[殺菌率の算定方法]
・各回の殺菌率（％）＝｛（薬剤添加前の菌数−薬剤添加後の菌数）／薬剤添加前の菌数｝×１００
・一連の試験における殺菌率（％）＝各回の殺菌率（％）／６[Calculation method of sterilization rate]
・ Bactericidal rate (%) of each time = {(the number of bacteria before adding the drug-the number of bacteria after adding the drug) / the number of bacteria before adding the drug} × 100
-Sterilization rate (%) in a series of tests = sterilization rate of each time (%) / 6
表１の結果に示すとおり、薬剤Ｃ（次亜塩素酸ナトリウム）及び薬剤Ｄ（次亜臭素酸ナトリウム）では、殺菌率が５０％以上９０％未満の範囲ではスライム付着抑制効果は得られず、殺菌率が９９．０％以上でスライム付着抑制効果が現れた。
一方、表１の結果に示すとおり、薬剤Ａ（次亜塩素酸ナトリウムと硫酸アンモニウムとを混合した反応液（モノクロラミンを生成又は含む殺菌剤））及び薬剤Ｂ（次亜塩素酸ナトリウムと臭化アンモニウムとを混合した反応液（モノブロラミンを生成又は含む殺菌剤））では、殺菌率が５０％以上９０％未満の範囲で明らかなスライム抑制効果が得られている。この結果より、モノクロラミン又はモノブロラミンを生成又は含む殺菌剤であれば、殺菌率９９％以上で処理しなくても、５０％以上９０％未満の範囲を維持することでスライムを確実に抑制できることがわかった。As shown in the results of Table 1, in the drug C (sodium hypochlorite) and the drug D (sodium hypobromite), the bactericidal rate is in the range of 50% or more and less than 90%, and the slime adhesion inhibitory effect cannot be obtained. When the sterilization rate was 99.0% or more, the slime adhesion suppressing effect appeared.
On the other hand, as shown in the results of Table 1, drug A (a reaction liquid (a bactericide that produces or contains monochloramine) in which sodium hypochlorite and ammonium sulfate are mixed) and drug B (sodium hypochlorite and ammonium bromide). In the reaction liquid (a disinfectant that produces or contains monobrolamin)), a clear slime suppression effect is obtained when the disinfection rate is in the range of 50% to less than 90%. From this result, if it is a disinfectant that produces or contains monochloramine or monobrolamin, slime can be reliably suppressed by maintaining a range of 50% or more and less than 90% without treatment at a disinfection rate of 99% or more. I understood.
Claims (3)
被処理対象となる製紙工程水中のスライムの原因となる微生物に対する殺菌剤の殺菌率が６０％以上９０％未満となるように殺菌剤を前記製紙工程水に添加すること、を含み、
前記殺菌剤が、モノクロラミン及び／又はモノブロラミンを生成する及び／又は含む殺菌剤であり（但し、ＮａＣｌＯとＮＨ 4 Ｂｒとを含む無機系殺菌剤と、ＮａＣｌＯ又はＮａＣｌＯ 2 とを併用する場合を除く）、
前記殺菌率は、Sphingomonas sp.に対する殺菌剤の殺菌率である、スライム発生防止方法。 A slime generation prevention method in a papermaking process,
Adding a bactericidal agent to the papermaking process water so that the bactericidal rate of the bactericidal agent against microorganisms causing slime in the papermaking process water to be treated is 60% or more and less than 90%,
The bactericidal agent is a bactericidal agent that produces and / or contains monochloramine and / or monobrolamin (provided that an inorganic bactericidal agent containing NaClO and NH 4 Br and NaClO or NaClO 2 are used in combination. except),
The said bactericidal rate is a slime generation prevention method which is a bactericidal rate of the bactericide with respect to Sphingomonas sp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014504516A JP5724071B2 (en) | 2012-08-24 | 2013-08-23 | Method for preventing slime generation in papermaking process |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012185609 | 2012-08-24 | ||
| JP2012185609 | 2012-08-24 | ||
| JP2014504516A JP5724071B2 (en) | 2012-08-24 | 2013-08-23 | Method for preventing slime generation in papermaking process |
| PCT/JP2013/072602 WO2014030751A1 (en) | 2012-08-24 | 2013-08-23 | Method for inhibiting slime generation in paper making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP5724071B2 true JP5724071B2 (en) | 2015-05-27 |
| JPWO2014030751A1 JPWO2014030751A1 (en) | 2016-08-08 |
Family
ID=50150054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014504516A Active JP5724071B2 (en) | 2012-08-24 | 2013-08-23 | Method for preventing slime generation in papermaking process |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5724071B2 (en) |
| WO (1) | WO2014030751A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112014032298A2 (en) * | 2012-06-25 | 2017-06-27 | Katayama Chemical Works Co | Cardboard manufacturing process |
| JP2017053054A (en) * | 2015-09-08 | 2017-03-16 | 株式会社片山化学工業研究所 | Method for producing old paper pulp |
| JP6361766B1 (en) * | 2017-03-15 | 2018-07-25 | 栗田工業株式会社 | Bacterial spore sterilization method in pulp and paper manufacturing process |
| JP6865936B2 (en) * | 2019-08-05 | 2021-04-28 | 株式会社片山化学工業研究所 | Manufacturing method of used paper pulp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000256993A (en) * | 1999-03-08 | 2000-09-19 | Hakuto Co Ltd | Slime control method |
| JP2009249296A (en) * | 2008-04-01 | 2009-10-29 | Somar Corp | Extermination agent for harmful microorganism and method for extermination of harmful microorganism using the same |
| JP2013204169A (en) * | 2012-03-27 | 2013-10-07 | Kurita Water Ind Ltd | Method for controlling slime in paper pulp production process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009095742A (en) * | 2007-10-16 | 2009-05-07 | Nisshin Kagaku Kenkyusho:Kk | Method for preventing slime and system for adding halogen-based disinfectant |
-
2013
- 2013-08-23 JP JP2014504516A patent/JP5724071B2/en active Active
- 2013-08-23 WO PCT/JP2013/072602 patent/WO2014030751A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000256993A (en) * | 1999-03-08 | 2000-09-19 | Hakuto Co Ltd | Slime control method |
| JP2009249296A (en) * | 2008-04-01 | 2009-10-29 | Somar Corp | Extermination agent for harmful microorganism and method for extermination of harmful microorganism using the same |
| JP2013204169A (en) * | 2012-03-27 | 2013-10-07 | Kurita Water Ind Ltd | Method for controlling slime in paper pulp production process |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014030751A1 (en) | 2014-02-27 |
| JPWO2014030751A1 (en) | 2016-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4713081B2 (en) | Control of biofilm formation in industrial process water. | |
| JP5256033B2 (en) | Synergistic composition and method for inhibiting microbial growth | |
| JP5339921B2 (en) | Inhibition of microbial growth in pulp and paper processing. | |
| US20170036931A1 (en) | Methods and kits for stabilizing oxidizers and sanitizing water | |
| JP5724071B2 (en) | Method for preventing slime generation in papermaking process | |
| JP5706428B2 (en) | Synergistic microbicidal composition comprising 2,2-dibromomalonamide and an oxidizing biocide | |
| KR101488681B1 (en) | Method of slime control in paper pulp manufacturing process | |
| JP4914146B2 (en) | Papermaking process water sterilization method | |
| JP2011226043A (en) | Method for suppressing generation of slime | |
| JP2020531567A (en) | Methods for controlling the growth of microorganisms and / or biofilms in industrial processes | |
| WO2013146786A1 (en) | Method for controlling microorganisms in aqueous system | |
| JP5635596B2 (en) | Halogenated amide biocidal compounds and methods of treating aqueous systems from near neutral to high pH | |
| JP5213299B2 (en) | Method and apparatus for adding slime control agent | |
| JP5357440B2 (en) | Harmful microorganism eradication agent and harmful microorganism eradication method using the same | |
| JP5729399B2 (en) | Slime control method in pulp and paper water system | |
| JP2013136609A (en) | Bactericide application of concentrated aqueous bromine chloride solution | |
| JP2014073451A (en) | Industrial antibacterial method | |
| JPH1147755A (en) | Slime controlling agent and method | |
| JP2005161254A (en) | Method for preventing adhesion of slime in water system | |
| JP6814917B2 (en) | Water-based slime suppression method | |
| JP2017128598A (en) | Method for controlling microorganisms in aqueous system | |
| JP4636334B2 (en) | How to kill microorganisms | |
| JP4636333B2 (en) | How to kill microorganisms | |
| JP2015226905A (en) | Microorganism suppression method in water system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20140930 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150205 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150210 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5724071 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |